The 61-inch astrometric reflector system
By: by K. Aa. Strand.
Series: Publications of the United States Naval Observatory ;; 2d ser., v. 20, pt. 1
Publisher: U.S. Govt. Print. Off.
Published: 1971
Place of publication: [Washington
Language: eng
Number of pages: 32
Subjects: Reflecting telescopes.
Notes: Includes bibliographical references.